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Quoted

Originally posted by StringCheesian
Can Qt 4 or 4.1 do it?

Quoted

From Qt docs:
windowOpacity : double
This property holds the level of opacity for the window.
The valid range of opacity is from 1.0 (completely opaque) to 0.0 (completely transparent).
By default the value of this property is 1.0.This feature is available on Mac OS X, X11 platforms that support the Composite extension, and Windows 2000 and later.
Note that under X11 you need to have a composite manager running, and the X11 specific _NET_WM_WINDOW_OPACITY atom needs to be supported by the window manager you are using.

Now I understand why Konsole uses "fake transparency", because real tranparency isn't avaliable unless you want the whole window to have the same opacity, and making different parts of the window different opacities is just impossible... great .